<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
		<script>
			function goBack(){
				window.history.back();
			}
		</script>
	</head>
	<body>
		This is js3
		<br />
		<input type="button" value="返回" onclick="goBack()"/>
	</body>
</html>
